Check Engine Light and Warning sound at WOT

[CTFSHWHISKER]

Ok, so here is what happened. Picked the boat up filled the oil injection tank but was not sure how much gas was in the tank, so I stopped on the way to the lake and got gas. I prepayed for $20 just to make sure there was enough for the little bit of running I was going to do. The boat, as it turns out, was almost full and I ended up completely topping it off.

Launched the boat and it took a few tries to get it started (not all that uncommon). Once it fired, it ran great idle out of the Marina. It is about a 3min idle out of the "no wake". When we got it out of the no wake, I put the boat up on plane and as soon as the RPMs settled out there was a constant tone, not a broken beeping. I looked at the warning light panel near the ignition and the light by "Check Engine" was illuminated. I then took it back off of plane and the tone stopped and the light went away. At this point, I thought it may have been a fluke so I put it back up on plane. Same thing.

There are 4 lights on the warning panel 1)No Oil 2)Engine Temp 3)Check Engine 4)Low Oil. It was the Check Engine the was lit

The water pump was working fine

The engine has a carb, so I doubt it has a computer.

correct,there is no computer,see #2 in my other reply,you need to use a remote fuel tank,if it runs fine and does not sound an alarm,the anti siphon valve is defective,if you still get an alarm then the problem is on the motor.what happens is the a.s valve is sucking shut.you will need to access the tank,what kind of boat is it?check engine light is a fuel restriction alarm,the over heat alarm system is seperate and will illuminate the over heat light only.